Wash basin



FIG. 1 is a perspective view of a wash basin showing my design;

FIG. 2 is a left side elevational view thereof; the right side elevational view being a mirror image thereof;

FIG. 3 is a front elevational view thereof; and,

FIG. 4 is a top plan view thereof.

The broken lines in the drawings represent unclaimed portions of the design and form no part thereof. 

The ornamental design for a wash basin, as shown and described. 